zulip/static/js/ui_util.ts

65 lines
1.9 KiB
TypeScript

import $ from "jquery";
// Add functions to this that have no non-trivial
// dependencies other than jQuery.
export function change_tab_to(tabname: string): void {
$(`#gear-menu a[href="${CSS.escape(tabname)}"]`).tab("show");
}
// https://stackoverflow.com/questions/4233265/contenteditable-set-caret-at-the-end-of-the-text-cross-browser
export function place_caret_at_end(el: HTMLElement): void {
el.focus();
const range = document.createRange();
range.selectNodeContents(el);
range.collapse(false);
const sel = window.getSelection();
sel?.removeAllRanges();
sel?.addRange(range);
}
export function blur_active_element(): void {
// this blurs anything that may perhaps be actively focused on.
if (document.activeElement instanceof HTMLElement) {
document.activeElement.blur();
}
}
export function convert_enter_to_click(e: JQuery.KeyDownEvent): void {
if (e.key === "Enter") {
e.preventDefault();
e.stopPropagation();
$(e.currentTarget).trigger("click");
}
}
export function update_unread_count_in_dom(unread_count_elem: JQuery, count: number): void {
// This function is used to update unread count in top left corner
// elements.
const unread_count_span = unread_count_elem.find(".unread_count");
if (count === 0) {
unread_count_span.hide();
unread_count_span.text("");
return;
}
unread_count_span.show();
unread_count_span.text(count);
}
/**
* Parse HTML and return a DocumentFragment.
*
* Like any consumer of HTML, this function must only be given input
* from trusted producers of safe HTML, such as auto-escaping
* templates; violating this expectation will introduce bugs that are
* likely to be security vulnerabilities.
*/
export function parse_html(html: string): DocumentFragment {
const template = document.createElement("template");
template.innerHTML = html;
return template.content;
}